Annealing box and furnace.



H. G. SHAW.

ANNEALING BOX AND FURNACE. APPLICATION FILED DBO. 5. 1908.

Patented Sept. 28, 1909.

-mrrw we M WITNESSES:

ATTORN BY same temperature.

, UNITED STATES PATENT OFFICE.

HENRY C. SHAW, OF GLENS HAW, PENNSYLVANIA.

Be it known that I, HENRY C. SHAW, a

citizen of the United States, residing at.

Glenshaw, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements 'in Annealing Boxes and Furnaces, of which the following specification.

My invention relates to annealing boxes and furnaces for use in connection with the same.

It is one of the objects of my invention to produce an annealing box which will roll during its passage through the furnace, thereby exposing all parts thereof to the If necessary in articular cases, I may provide a fluid coole track for the annealing boxes.

It is one of the purposes of my invention to anneal sheetsteel in coils instead of in packs, as has hitherto been the custom, but

it is to be understood that my annealing boxes may be used for annealing metal products in various forms.

Referring to the drawlngs, Flgure 1'1s a longitudinal view of the annealing furnace which I prefer to use, the annealing boxes being shown in end elevation; Fig. 2, a vertical section through an annealing box and the floor of the annealing furnace; and Fig. 3, a

top view of a" coil of sheet steel for which I my annealing boxes are particularly adapted. On thexlrawings, 1 represents the roof and 2, the bottom of an annealing furnace which I prefer to employ. Preferably the fioor 2 inclines downwardly from the rearto front-land is provided with the openings 3 to admit the heat from the gas burners 4 beneath the floor. A track or pair of-rails extends longitudinally of the furnace and i lies on the floor 2 but itmay be supported otherwise: It may be constructed in various ways but I' refer to employ a pair of water cooled con uits or pipes 6 spaced apart to support the opposite ends of the rolling :boxes 7 The annealing box 7 is approxif mately cylindrical in outline, and in its preferred form iscomposed of the body 8, and the cover 9 with means for'sealing the same andsecuring the body and cover together. The body" of the box 7 is composed of steel or iron and is circular in vertical cross-section. One end is open but the other end is closed and pressed in toward the open end to form the depression 10 and the internal pro- Specification of Letters ratent. Patented Application filed December 5, 1908. "Serial Ho. 466,114.

ANNEALING BOX AND FURNACE.

Sept. 28,- 1909.

jection 11. The edge of the body is provided all around with the groove 12, in; which is placed the gasket 13 composed of asbestos rope or other incombustible sealing material. The cover'9 is shaped like the body 8 except that it is guite shallow. It has the depression 14 an the internal projection 15,which stands directly opposite the projection 11 when the 'body and the cover are axially alined. The lower edge of the cover 9 is seated on the gasket 13. The bolt 16 is secured to the projection 11 in the axial center of the annealing box and extends through t-heprojection 15. The cap-nut 17 is applied to the end of the bolt lti in the depression 14 and screwed down tight against the outer face of the projection 15, thereby drawing the body 8 and the cover securely together, the interposed gasket 13 sealing the box 7 air-tight. Each box 7 has a pair of annular ribs orflan es 5 which engage the pipes 6 just as the iianges of the car wheels engage the rails of a railway.

17 represents the coils of sheet-metal, one

being shown within the annealing box (Fig. 2), the projections 11 and 14 being within the central opening of the coil.

' The annealing boxes may be supplied with carbonic gas or other non-oxidizing substance, as sand, to prevent the formation of through the furnace, each. ox'pressing or.

hearing against the one next in front thereof. )The line of boxes is checked by the feed druni'18 situated in front of the furnace. The drum has the pockets 19 to receive the boxes, the division-walls between the pockets forming abutments for holding back the line of boxes. The drum 18 carries the wormwlieel 20 which meshes with the worm 21 driven by the motor 22 through the gearing boxes 7.

I claim The motor can be runat such a rate as' to remove theboxes from the oven as fast I 1. A cylindrical annealing box for a hollow coil, composed of a body and a cover, one having an internal projection extending toward the hollowof-the coil, and a fastening toengage the lowermost box and'permit the device inthe depression made by said'projection for fastening the gether.- v

2. A cylindrical annealin 'box for a hollow coil, composed of a b y and a icover, each having an internal projection extendin toward thehollow of the coil, a bolt carri byone of the projections and extending through the other projection, and means 00- operating with the bolt and the last-named projection for securing the body and cover together.

3. In an annealing apparatus, an anneal mg oven having an inclined support for ro ling annealing boxes in mutual successive contact, a constantly moving stop arranged body and cover toseries of boxes to gradually move through the oven and to engage "the next box when the lowermost 'boxis released.

4. In an annealing apparatus, an annealing oven having an inclined support for ro ing annealing boxes in mutual successive contact, a constantly rotating star-wheel to engage the lowermost of the series of boxes 25 and release the same and to engage the next box when the lowermost box is released.

Signed at Pittsburg,

December, 1908.

HENRY 0. SHAW.

Witnesses:

' SUZANNE S-. BEATTY,

F. N. BARBER.

Pa., this 2nd day of v 

